We analyze the dynamics of model supercooled liquids in a temperature
regime where predictions of mode coupling theory (MCT) are known to be
valid qualitatively. In this regime, the Adam-Gibbs (AG) relation, based
on an activation picture of dynamics, also describes the dynamics
satisfactorily, and we explore the mutual consistency and interrelation
of these descriptions. Although entropy and dynamics are related via
phenomenological theories, the connection between MCT and entropy has
not been argued for. In this work, we explore this connection and
provide a microscopic derivation of the phenomenological Rosenfeld
theory. At low temperatures, the overlap between the MCT power law
regime and AG relation implies that the AG relation predicts an avoided
divergence at T-c, the origin of which can be related to the vanishing
of pair configurational entropy, which we find occurring at the same
temperature. We also show that the residual multiparticle entropy plays
an important role in describing the relaxation time. (C) 2015 AIP
Publishing LLC.